Type-writing machine.



A. G. F. KUROWSKI.

TYPE WRITING MACHINE.

APPLICATION FILED MAY 6. 1913.

1, 172,537. Patented Feb. 22, 1916.

wimeawu @757 M f 2g 2 7 UNITED STATES PATENT OFFICE.

ALFRED G. F. KUROWSKI, OF NEW YORK, N. Y., ASSIGNOR TO UNDERWOOD TYPE- WRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

TYPE-WRITING MACHINE.

the cylindrical platen of a typewriting Ina-- chine, and more particularly to a tube-like frame placed on the platen and provided with two sets of oppositely disposed guides to receive the cards, address-stencils, or the like.

An object of the invention is to provide a practical form of duplex card holder having two sets of guides at opposite ends of the platen, and s0 positioned that the cards or stencils may be placed in the guides alternately and without necessitating the return of the platen to the same starting position for each card. In other words, the guides are substantially at diametrically opposite positions on the holder.

A further object of the invention is to provide means to permit a step-by-step adjustment of the holder in a circumferential direction to provide for uniform wear of the platen.

The attachment is in the form of a skeleton.

the platen. The frame is provided with two sets or pairs of arc-shaped guides to receive a stencil or card, the two sets of guides being located substantially diametrically opposite each other, and also at opposite ends or on opposite sides of the center of the platen as measured in the direction of its length. This arrangement facilitates the work of writing on a series of cards, as when one card is completed the platen and holder by a slight turn can be brought into position to receive the next card at the opposite end of the holder. The platen is thus always rotated in a forward direction and at each half revolution Specification of Letters Patent.

Application filed May'G, 1913. Serial No. 765,730.

is brought into position to receive a new card.

Connected to one or both ends of the holder is a pawl or pawls engaging atoothed wheel or wheels secured to the platen and thus preventing the holder from turning on the'platen. By lifting the pawls the holder maybe adjusted to a new position to distribute the wear on the platen.

Other features and advantages will hereinafter appear. v

In the accompanying drawings, Figure 1 is a perspective view showing the platen of an Underwood typewriting machine with the present invention applied thereto. Fig. 2 is a sectional view showing one end of the platen and attachment. -Fig. 3 is a perspective view of the attachment or holder disassembled.

The platen 1 is fixed to an axle 2'to which are also'secured thumb wheels 3 and 4 and a line-space wheel 5 for rotating the platen. The platen is journaled in the ends of a frame 6'. The holder or attachment is in the form of a skeleton-cylinder or cylindrical frame 7 having ends 8and 9'. In assembling the parts, the holder is slipped endwise onto the platen before the end 9, for example, is secured in position. The end 9 is then attached to the holder, for example by means of cars or lugs l0'secured in notches -11 in the holder. Over the end plate 9 is a toothed wheel or rack 12 secured to the platen by screws 13 threaded into the end of the platen. A pawl or looking dog 14 engages the toothed wheel or rack 12 and is held in looking position by a spring 15. other end of the platen there are also provided a toothed wheel or rack 16 and a spring-held pawl 17.

The holder 7 is provided with a set or pair of guides 18 and 19 located respectively at the right-hand end and near the center of the holder. These guides are arc-shaped and offset or spaced from the platen to form areshaped passageways for the edges of the work-sheet or card. As shown, these guides consist of thin plates of-sheet material se- At the cured respectively to the ring portions 20 and 21 of the frame and project beyond said rings to form with the platen guideways for the cards. A similar pair of guides 22 and 23 are located at the left-hand end and middle respectively of the holder and substantially opposite the guides 18 and 19. The guides may consist of sheet metal brazed, riveted, soldered, or otherwise secured to, or may be integral with the ring portions of the holder.

In operation, the card or stencil is placed in the holder by inserting the edges beneath a pair of guides, as 18 and 19, and slipping the card into position. The card is then written upon or stenciled in the usual manner, by the types 24-. lv'hen one card has been completed, a slight forward rotation of the platen will bring the opposite guides 22 and 23 into position to receive a new card. When this second card is completed, the platen has been rotated approximately to its original position ready to receive another card in the first set of guides. in this manner, the rotation of the platen may at all times be in a forward direction, and at each half revolution is brought into position to receive a new card. When a large number of addresses are to be stenciled or cards writ-ten upon, the time consumed in adjusting the platen, placing new cards in posi tion, and removing the completed. cards, is greatly reduced by this arrangement.

In order to change the position of the holder on the platen, it is only necessary to depress the free ends of the pawls 14 and 17 and rotate the holder on the platen the distance of one or more teeth, thereby presenting a new printing surface. The holder may thus be readily adjusted occasionally to provide for uniform wear of the platen. By providing two pairs of the guides for diiferent lengths of the platen the printing area is increased and the wear on the platen thus reduced.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used Without others.

Having thus described my invention, 1 claim:

1. The combination of a cylindrical platen for a typewriting machine, and a duplex card-holding attachment therefor, in the form of a cylindrical surrounding frame provided with spaces exposing different portions of the platen surface, said frame provided at each of said spaces with guides for the edges of a card, said guides curved to conform to the curvature of the platen and normally spaced from the platen to form therewith. narrow guideways for the edges of the cards, whereby the latter may be guided into writing position over the platen at said spaces.

2. The combination of a typewriter platen,

and an attachment consisting of a skeleton frame surrounding the platen and having ends over the platen ends.

3. The combination of a rotary platen and a duplex card-holding attachment comprising a cylindrical surrounding frame thereon, with spaces exposing different sections of the platen surface, and guides on the frame for the edges of the cards, said guides arranged in pairs, one pair associated with each of said sections, each pair of guides, when the frame is in position on the platen, providing oppositely disposed guideways curved to conform to the curvature of the platen and positioned to receive the opposite edges of a card and hold it in writing position against the platen.

l. A, duplex card-holding attachment for a typewriter platen, said attachment comprising a cylindrical frame to surround the platen, and having platen-exposing spaces arranged to expose portions of the platen on opposite sides thereof, and arc-shaped guides on said frame, saidguides, when the frame is in position on the platen, providing guideways curved to conform to the curvature of the platen to receive cards and hold them in position against the platen.

5. An attachment for a typewriter platen comprising a cylindrical, skeleton frame to surround the platen, said frame providing platen exposing spaces, and arc-shaped guides located adjacent the middle and ends of the frame, said guides providing, when the frame is in position on the platen, narrow, arc-shaped. guideways at the ends of said spaces, permitting the edges of the cards to slide into position on the platen over the spaces to be written upon,

6. An attachment for a typewriter platen, consisting of a cylindrical frame, a pair of guides located one at the end of the frame and the other in an intermediate position, and a second pair of guides comprising a guide at the opposite end of the frame and a guide at an intermediateposition, said pairs of guides being respectively arranged for use at opposite sides of the platen.

7. An attachment for a typewriter platen, consisting of a cylindrical frame, a pair of guides located one at the end pf the frame and the other in an intermediate position, and a second pair of guides comprising a guide at the opposite end of the frame and a guide at an intermediate position, said second pair of guides being located substantially opposite the first-named pair of guides, each. pair of guides being operative ver more than half the platen length at opposite sides thereof.

8. An attachment for a typewriter platen, comprising a cylindrical skeleton frame having end ring portions, an intermediate ring portion, and arc-shaped guides secured to Mid said ring portions and projecting beyond the edges of the rings to form with the platen arc-shaped guideways to receive the edges of a card.

9. The combination of a cylindrical platen, a card holder mounted thereon and rotatably adjustable as a whole on the platen, and a pawl and rack device for securing the .holder'in adjusted position and preventing rotation of the holder relatively to the platen in either direction while the platen is in any rotative position.

10. The combination of a rotary platen, a unitary card holder mounted thereon, a rack connected to the platen, and a cooperating pawl on said holder, to engage the rack and lock the card holder against rotation relatively to the platen in either direction while the platen is in any rotative position.

11. The combination of a rotary platen, a

unitary card holder mounted thereon andhaving an end plate over the platen end, a pawl pivoted to said end plate, and a cooperating rack having a fixed connection with the platen.

12. The combination of a cylindrical platen, a unitary holder mounted thereon and having end plates over the platen ends,-

pawls pivoted to said end plates, and cooperating racks secured to the ends of the platen.

13. The combination of a cylindrical platen, and a card holder mounted thereon, said holder comprising pairs of guides arranged at opposite sides of the platen.

11. The combination of a platen and a card holder mounted thereon comprising pairs of guides on opposite sides of the platen and at difierent positions longitudinally of the laten.

15. s an article of manufacture, a card holder consisting of a frame having ring portions, and arc-shaped guides connected to and projecting laterally beyond the edges of the rings.

16. The combination of a cylindrical platen, a frame thereon comprising ringssurrounding the platen, and arc-shaped guides on said rings projecting laterally beyond the rings to form with the platen arcshaped guideways 17. On combination with a revoluble platen of a type-writing machine, a card holder formed to slip endwise on and oif the platen, and comprising an end to overlie the platen end and prevent endwise movement of the holder on the platen, the holder being rotatively adjustable on the platen, and interlocking parts connected to the platen and holder to lock the holder in its adjusted position and prevent rotation of the holder on the platen while the latter is in any rotative position.

18. A card holder formed to slip on and off a revoluble platen and having an end to fit over the end of the platen to secure the holder in position, the holder being rotatable on the platen for adjustment, and a locking rack and dog connected to the platen and holder and operable to lock the holder against rotation relatively to the platen while the platen is in any rotative position.

19. In combination with a revoluble platen,

a car holder comprising a body portion formed to slip endwise onto the platen and an end to retain the holder on the platen, the holder being rotatable on the platen for adjustment, a toothed wheel connected to the platen, and a dog on the holder to engage said wheel and retain the holder in any rotative position of adjustment.

20. An attachment for typewriter platen consisting of a cylindrical frame comprising bars extending longitudinally of the platen, and rings connecting said bars and surrounding the platen. and guides for the edges of cards or work-pieces projecting laterally from the said rings and forming with the platen guideways for the cards. said rings forming gages for the side edges of the cards, and said bars forming stops for the leading edges of the cards.

21. An attachment for a typewriter platen comprising rings to surround the platen, a. bar extending longitudinally of the platen and connecting said rings, and curved guides extending laterally from the rings tooverliethe edges of a car or work-piece, said rings forming gages for the lateral edges of the work-piece, and said bar forming a stop for the leading edge of the work-piece.

22. An attachment for a typewriter platen comprising rings to surround the platen, a bar extending longitudinally of the platen and connecting said rings, curved guides ex- .tending laterally from the rings to overlie the edges of a card or work-piece. said rings forming gages for the lateral edges of the work-piece, and said bar forming a stop for the leading edge of the work-piece; said attachment formed to slide endwise onto and ofi of the platen, and means for securing it .in position on the platen.

23. An attachment for a typewriter platen comprising rings to surround the platen, a bar extending longitudinally of the platen and connecting said rings. curved guides extending laterally from the rings to overlie the edges of a card or work-piece, said rings forming gages for the lateral edges of the work-piece, and said bar forming a stop for l the leading edge of the work-piece; said attachment formed to slide endwise onto and off of the platen, means for securing it against endwise displacement, and an adijusting means permitting said attachment to be rotated on the platen and comprising means to hold it in different positions of adjustment to which it may be rotated.

24. A duplex card holder attachment for a, re'voluble platen of a typewriting machine comprising a skeleten frame formed to be slid endwise into pesition on the plaien and formed with epen spaces exposing portions of the platen surface on opposite sides of the platen, each of said spaces forming the priming field for a work-piece carried by 1, new? 

